libc = "0.2"
atty = "0.2"
tracing = { version = "0.1.28" }
-tracing-subscriber = { version = "0.2.16", default-features = false, features = ["fmt", "env-filter", "smallvec", "parking_lot", "ansi"] }
-tracing-tree = "0.1.9"
+tracing-subscriber = { version = "0.3.3", default-features = false, features = ["fmt", "env-filter", "smallvec", "parking_lot", "ansi"] }
+tracing-tree = "0.2.0"
rustc_middle = { path = "../rustc_middle" }
rustc_ast_pretty = { path = "../rustc_ast_pretty" }
rustc_target = { path = "../rustc_target" }